Stagestack is the new vector app that Quasado has been developing for the past two years. It's supposed to have the feel of Freehand without being an exact clone of it. You can support the development of it by making a donation, which will qualify you for a discount on the final product. They have posted some videos of the features that they have already completed. The cost of the program will be approximately 400 Euros or $490 USD.
Here's a youtube video of expressive running on Mac OS X 10.6. It's still in the early stages of development, but it already has some impressive features. At roughly 1:12 minutes he splits open a circle to make a pac-man like shape with very little effort–I've never seen this in a vector app before. Rounding one corner of a rectangle looks simple too.
Since FreeFreehand.org has settled with Adobe the site has changed to FreehandForum.org which will help support the development of a Freehand alternative. It will also function as a forum for vector app professionals.